Finding the Fourth Proportional to 3,791.89, 5,678.98 and 3,660.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,791.89 : 5,678.98 = 3,660.51 : x
2. Step 2: Convert to fraction form
   3,791.89/5,678.98 = 3,660.51/x
3. Step 3: Cross multiply
   3,791.89x = 5,678.98 × 3,660.51
4. Step 4: Simplify right side
   3,791.89x = 20,787,963.08
5. Step 5: Solve for x
   x = 20,787,963.08/3,791.89
6. Step 6: Final answer
   x = 5,482.22